This is an app made by a teacher using the experience after years of teaching German to adults. What can you expect from it?
1.It is not just a collection of pieces of information every bit of information that is given to you will be given at the right time in the right order so the learning process can be as easy and smooth as possible.
2.Every bit of grammar is explained through sentences there are no tables to learn you just learn the grammar through sentences because that is the natural way our brains learn a language through meaningful repetition.
3.The words that are used will always be suitable to the level that you are at and they are repeated at intervals in future sentences.
4.You will be asked to translate sentences it is not just a passive process. In time you will be able to automatically use grammar and vocabulary without thinking.

And remember there is a button in the app that will allow you to send messages to the developer. Use it if you have suggestions or observations.